Re: A Question about "Inter Packet Gap and SOP Lane alignment"
Rich,
Allow me to clean up a few editing errors to avoid confusion:
Rich Taborek wrote:
>
> 1) No change to EOP column which contains the first 1 to 4 columns of the IPG.
> Note that the EOP counts towards IPG.
The EOP column contians the first 1 to 4 BYTES of the IPG.
> 2) Transmit /A/ or /R/ randomly while maintaining minimum 16 column /A/ spacing.
Transmit /A/ or /K/ randomly.
Enjoy,
Ben
Rich Taborek wrote:
>
> Boaz,
>
> Your question is answered in a presentation made at the La Jolla meeting:
> "8B/10B Idle Pattern for 12-byte IPG" by
> Rich Taborek and Don Alderrou of nSerial,
> http://grouper.ieee.org/groups/802/3/ae/public/jul00/taborek_1_0700.pdf
>
> This proposal modifies the fixed starting /A/K/R/ Idle pattern for all
> applications of 8B/10B encoded 4-lane streams was accepted into the set of
> baseline proposals along with the core XAUI/XGXS proposal. The specific change
> is as follows:
>
> 1) No change to EOP column which contains the first 1 to 4 columns of the IPG.
> Note that the EOP counts towards IPG.
> 2) Transmit /A/ or /R/ randomly while maintaining minimum 16 column /A/ spacing.
> 3) Transmit /R/
> 4) Transmit /K/, /R/ or /A/ randomly while maintaining minimum 16 column /A/
> spacing until SOP detected.
>
> Note that this proposal works for IPGs as small as 9. Detailed state machines
> are included at the end of the PDF file.
>
> Best Regards,
> Rich
>
> --
>
> Boaz Shahar wrote:
> >
> > Hello Steve,
> > I have a question in regards to your presentation "Inter Packet Gap..." in
> > the last meeting:
> >
> > You suggest to use only 2 columns of Idle as a minimum for IPG. In previous
> > proposals (e.g.
> > http://grouper.ieee.org/groups/802/3/ae/public/may00/taborek_2_0500.pdf
> > slide 14) the suggested gap is a minimum of 3 columns-/A/, /K/, and /R/. So:
> > Can you please say which of them should be eliminated, or define a procedure
> > which say which type of Idle columns should be inserted?
> >
> > Thanks,
> > Boaz
>
> -------------------------------------------------------
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> Chief Technology Officer Cell: 408-832-3957
> nSerial Corporation Fax: 408-845-6114
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